knobbing,
I find it hard to take anything you write seriously after your first post with its big officious tone being factually incorrect.
But what's your point? Again, nobody is saying that the brain cannot be altered.
I am saying that you are skating on very thin ice when you say genetic factors are involved in mental health.
When the facts are that in every. single. instance. of mental health problems, there are environmental and circumstancial reasons why that person is ill.
Genetics are by the by, and that is my point.
BUt some people in the mental health system (drugs companies for a start) have a vested interest in saying that some people just have faulty brains and that's the end of that.
Er yeah, right. Faulty brains that have nothing to do with the abuse they've endured 
And while we're on it, you have to ask your self why people are scrabbling around to prove why victims of environmental circumstances are actually ill because of some innate tendency.
You mention post partum psychosis. Again, why on earth would you hunt for genetic factors when women in our society receive INADEQUATE emotional and physical support post partum. Women in Japan are not allowed to do housework for the first month, for example. IN other cultures, women flock to support a mother, financially, logistically. There is no such obligation upon society iin western cultures. HEr main source of support is her spouse and if he's an arse, she's fucked. Add to that, your "genetic" factors could actually be a cycle of deprivation stemming from the new mother's ^own' mother's lack of support when she had given birth, leading to bonding problems and the like.
This maniacal patriarchal hunt for genetic/organic basis for mental illness is obtuse. Fix society, not the people who are suffering under our money-grabbing, capitalist system. It is women who are suffering the fall-out of the absolute break down in community ties and support for new mothers. Easy option? Blame women for their psychosis 
Your argument is intellectually shallow, and you do not have evidence on your side. ONly speculation
Which begs the question of why on earth someone would choose to speculate that post partum psychosis is a problem with that individual person, when the society she is living in is inimical to mothers, especially vulnerable new mothers.
YOu have to ask yourself whether the people hunting for an organic/genetic basis are wholly sane themselves.